cast in reshape and reshape2
?plyr::summarise seems pretty helpful to me. ?If you can do better, please submit a patch - they are very much appreciated.
My failure to find it stemmed from it not being mentioned in any way in package reshape2's help files, but maybe I was mistaken that it was meant to be used in that context?
Well, it's not - which is why it's not documented in reshape2. Hadley
Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/